Laminated core manufacturing apparatus and laminated core manufacturing method

Abstract

A Laminated core manufacturing device includes: an overlapping unit configured to overlap the plurality of laminated core materials conveyed along different conveyance routes; an edge aligning unit configured to align edge positions in a width direction of the plurality of laminated core materials between the plurality of laminated core materials; an uplift prevention unit configured to prevent uplift of the plurality of laminated core materials; an edge position correction unit configured to correct the edge positions in the width direction of the plurality of laminated core materials; and a punching unit configured to punch out the plurality of laminated core materials which are overlapped by the overlapping unit and have been subjected to an edge position alignment process performed by the edge aligning unit, an uplift prevention process performed by the uplift prevention unit, and an edge position correction process performed by the edge position correction unit.

The invention claimed is: 
     
       1. A laminated core manufacturing apparatus for manufacturing at least a punched out body of a plurality of laminated core materials used for manufacturing a laminated core, the laminated core manufacturing apparatus comprising:
 an overlapping unit configured to overlap the plurality of laminated core materials conveyed along different conveyance routes; 
 an edge aligning unit configured to align edge positions in a width direction of the plurality of laminated core materials between the plurality of laminated core materials; 
 an uplift prevention unit configured to prevent uplift of the plurality of laminated core materials whose edge positions are aligned by the edge aligning unit; 
 an edge position correction unit configured to correct the edge positions in the width direction of the plurality of laminated core materials; and 
 a punching unit configured to punch out the plurality of laminated core materials which are overlapped by the overlapping unit and have been subjected to an edge position alignment process performed by the edge aligning unit, an uplift prevention process performed by the uplift prevention unit, and an edge position correction process performed by the edge position correction unit, so as to obtain the punched out body, 
 wherein the edge aligning unit includes:
 a pair of side rollers facing each other in the width direction of the plurality of laminated core materials; and 
 a spring configured to generate elastic force to bias the pair of side rollers in a facing direction, 
 
 wherein the elastic force of the spring increases or decreases in accordance with a difference between a maximum edge-to-edge distance and a reference interval when the maximum edge-to-edge distance, which is a distance between farthest edges in the width direction of the plurality of laminated core materials, exceeds the reference interval between the pair of side rollers, and 
 wherein the pair of side rollers sandwiches the plurality of laminated core materials in the width direction by the elastic force of the spring so as to align the edge positions. 
 
     
     
       2. The laminated core manufacturing apparatus according to  claim 1 , wherein the edge aligning unit is installed just before an inlet of the overlapping unit or just behind an outlet of the overlapping unit. 
     
     
       3. The laminated core manufacturing device apparatus according to  claim 2 , further comprising an additional edge aligning unit configured to align edge positions in a width direction of the plurality of laminated core materials between the plurality of laminated core materials, wherein
 when the edge aligning unit is installed just before the inlet of the overlapping unit, the additional edge aligning unit is installed just behind the outlet of the overlapping unit; and 
 when the edge aligning unit is installed just behind the outlet of the overlapping unit, the additional edge aligning unit is installed just before the inlet of the overlapping unit. 
 
     
     
       4. The laminated core manufacturing apparatus according to  claim 1 , wherein the edge aligning unit is provided with the pair of side rollers and includes a pair of side roller stages movable in the width direction of the plurality of laminated core materials. 
     
     
       5. The laminated core manufacturing apparatus according to  claim 1 , wherein the uplift prevention unit is installed on an upper part of the edge aligning unit so as to close an upper side of the edge aligning unit. 
     
     
       6. A laminated core manufacturing method for manufacturing at least a punched out body of a plurality of laminated core materials used for manufacturing a laminated core, the laminated core manufacturing method comprising:
 an overlapping step of overlapping the plurality of laminated core materials conveyed along different conveyance routes; 
 an edge aligning step of aligning with an edge aligning unit edge positions in a width direction of the plurality of laminated core materials between the plurality of laminated core materials; 
 an uplift prevention step of preventing uplift of the plurality of laminated core materials whose edge positions are aligned in the edge aligning step; 
 an edge position correction step of correcting the edge positions in the width direction of the plurality of laminated core materials; and 
 a punching step of punching out the plurality of laminated core materials which have been overlapped in the overlapping step, and subjected to an edge position alignment process in the edge aligning step, an uplift prevention process in the uplift prevention step, and an edge position correction process in the edge position correction step, so as to obtain the punched out body, 
 wherein the edge aligning unit includes:
 a pair of side rollers facing each other in the width direction of the plurality of laminated core materials; and 
 a spring configured to generate elastic force to bias the pair of side rollers in a facing direction, 
 
 wherein in the edge aligning step, the elastic force of the spring increases or decreases in accordance with a difference between a maximum edge-to-edge distance and a reference interval when the maximum edge-to-edge distance, which is a distance between farthest edges in the width direction of the plurality of laminated core materials, exceeds the reference interval between the pair of side rollers, and 
 wherein in the edge aligning step, the pair of side rollers sandwiches the plurality of laminated core materials in the width direction by the elastic force of the spring so as to align the edge positions.